fixedness vs lodgement

fixedness and lodgement both are nouns.

Word	Noun	Adjective	Verb	Adverb
fixedness	Yes	No	No	No
lodgement	Yes	No	No	No

As nouns, lodgement is a hyponym of fixedness; that is, lodgement is a word with a more specific, narrower meaning than fixedness:

Other hyponyms of fixedness include lodging, lodgment.

fixedness (noun)	lodgement (noun)
the quality of being fixed in place as by some firm attachment	the state or quality of being lodged or fixed even temporarily
the quality of being fixed and unchangeable
remaining in place